19 January 2011 Fiber laser sensor based on fiber-Bragg-grating Fabry-Perot cavity
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Proceedings Volume 7986, Passive Components and Fiber-Based Devices VII; 798615 (2011) https://doi.org/10.1117/12.888651
Event: Asia Communications and Photonics Conference and Exhibition, 2010, Shanghai, Shanghai, China
Abstract
We propose a fiber-Bragg-grating Fabry-Perot (FBG-FP) cavity sensor interrogated by a pulsed laser. The FBG-FP cavity is directly written into the same photosensitive fiber, which consists of a pair of FBGs with identical center wavelength. The modulated laser pulses are launched into the FBG-FP cavity. Each pulse produces a group of reflection and transmission pulses. The cavity loss in the FBG-FP cavity is determined from the power ratio of the first two pulses reflected from the cavity, which could be detected for the sensor measurement. This technique has the advantages that it does not require high reflectivity FBG and is immune to the power fluctuation of the light source.
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Jianfeng Chen, Jianfeng Chen, Yunqi Liu, Yunqi Liu, Tongjian Cai, Tongjian Cai, Tingyun Wang, Tingyun Wang, } "Fiber laser sensor based on fiber-Bragg-grating Fabry-Perot cavity", Proc. SPIE 7986, Passive Components and Fiber-Based Devices VII, 798615 (19 January 2011); doi: 10.1117/12.888651; https://doi.org/10.1117/12.888651
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